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Simulates indirect light bouncing through the scene.
FPS
High
Visual
Very high
VRAM
Medium
CPU
Low
Latency
None
What it does
Global illumination can be a major part of a game’s visual identity. Software techniques range from moderate to heavy, while ray-traced variants are usually very expensive.
Games may also call it: GI Quality
Decision guide
Lower it when
Lower it when lighting is a major GPU cost and a simpler mode remains visually coherent.
Keep it high when
Keep it higher when the game relies on indirect lighting for readable interiors and atmosphere.
Handheld advice
Prefer the non-ray-traced or medium option when available.
Restart
Usually not required
Some games still apply changes only after reloading a scene or restarting.
Do not overread the meter
Implementation differences are enormous; measured game evidence matters more than the generic score.